Carbureter.



O. E. MAUD;

GARBURETER.

APPLIOATION FILED MAY 14, 1909.

Patented June 20, 1911.

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MAUI), or Mon'rrnnr', cnmronnm.

CARBUEETER.

Specification of Letters-Iacent; Patented J none 20, 1911,

Application an ma 14,1909. Seria1 No.4.-95,921. I

' ToalZ'uiliom itrnag comerni i Be it known that I, GnannnsEnwarn sid' at, Monterey, in the county 'of Mont terey and State of California, have invented a new and useful Carbureter for InternaL' ombustion Engines, of which the follow-' ing is a specification. y

This invention has reference to improve ments'in zcarbureters for internal combustion engines and object is to producea car"- bureter that will give the right mixtures-at all speeds andin which, even on steep grades,

the asolenelevel is always maintained. The invention will be best understood ffrom a oonsideration of the following-detail "description taken inconnection with the accompany' g drawings forming apart of this gspemfication, inwhich drawings, '20 i e igure- 1 "is a centralf fivertical section through tion onthlihe A-B of Fig. 1. v Referring to the drawings there is shown an; annular reservoir 1 the innerwalls of "2 5 which form a central passage 2 and this r eservoir is provided with a top or cap plate. 3 on which is formed 'or to which is secured a piped in alinement with the passage 2 and terminating-at the ,up' r end in a threaded liinent of'a. connecting pipe leading to the engine which latter however not: shown-in the drawings. The lower end of the; passage 2 has the walls screw-threaded as indicated at 6 and into this threaded portion is screwed a collar 7 threaded on. its exterior surface and threaded 'interiorly to receive a tubular. nozzle 8,

which is threaded to screw into the collar 7 f and the lower end 9 of which is open and 4 flaring while the upper end 10 of the nozzle isiipen and contracted. The nozzle 8 between thetwo endsis suhstantially cylindri= .cal Tlre'collar 7 adjacent to the nozzle 8 is formed with anannular series of equally eizlpaced perforationsfll. The upper face of e collar, 7 forms a seat-fora radial flange .13 on thelower end of a 'sleeve-14,snugly jfittin'gthe cylindrical portion of the nozzle-8 but not so snugly as to prevent itfrom mov' 'i longitudinally on said nozzles This i flange 13 is of such sizeas to cover theiperw v forations 11 when seated on the collar? and a when this flange is raised by the suction of the engine the passages 11 areopqtiid .to a

commensurate extent 5 Spaced;a i short-"distance from the upper end oti the...sleeve. 14

'MAUD, a citizen of the United States, (re-B the carbureter, Fig; 2 is a cross reventing the sleeve from being moved too hi h by the suction ofthe engine pistons.

urrounding the lower end of the nozzle 8 below the collar 7 is an annulus 15 having openings therethrough matching the openings 11 in the collar The annulus 15 may be rotated about the longitudinal axis of the nozzle 8 so that the openings through the annulus may be moved more or less out-of coincidence with the openings 11 and correspondinglythrottle them, at the will of the operator." A handle 15, on the annulus '15Iis-providedfor this purpose.

Formed on one side of the outer wall of the reservoir 1 is a longitudinally disposed are stops 12 projecting from the nozzle 8 and I boss 16. having a longitudinal bore for the reception of a needle valve stem 17 appropriately threaded as shown at 18 to (match alike threaded portion of the bore of the boss 16 and at the upper end exterior to the ing head 19 by means of which the stem ma be turned on lts longitudinal axis at the will of the operator. The lower end of the stem '17.is formed into a needle valve 19 entering a valve seat formed in oneend of a pipe 20 having at the said end a laterally extending flange 21 seated against a threaded extension formed on the lower end of the boss 16 and boss the stem 17 is provided with a manipulatthere held by a suitable gland or collar 22, it being understood that if needed suitable.

packing will be inter osed to prevent leak The interior 0 the reservoir 1 com;

The pipe 20 is appropriately bent and.

carried to a point coincident with the longitudinal axis of the nozzle 8 and there carries another pipe 24 extending axially through the nozzle 8 to the contracted end thereof it I and constituting a jet. The lower end oi this pipe is" accessible through an opening closed by a suitable plug 25. a

r the reservoir 1, there is lodged an annula "at-26 audit-his float is centeredin the reservoir by cirhum-ferentially spaced ribs 127, ffornied on the inner walls of the reservoir, and longitudinal thereof so that the float; may move up and down in the reservoir with the smallest degree of contact therewith to reduce friction. v

/ Formed on theunder side of the cover 3 are spaced cars 28 carrying a pintle 29 extending through other ears 30 close to the pegs-328 and formed] on the two arms of a 'bOIGQ-Ollt portion of the tee.

yoke 31 constituting an operating lever. The outer or 'free ends of this yoke lever are bifurcated as shown at 32 to receive ears 33 on the upper face of the float 26 so that the said fioat'is pivotally connected to the lever yoke 31, the said lever yoke constituting a lever of the first class with the shorter arm formed at the connecting point of the.

yoke as indicated at 34.

Tapped through the cover 3 immediately above the lever arm 34 is a tee coupling 35, one member of the tee being bored out longitudinally to form a valve seat 36 for a valve 37 having a guiding stem 38 extending through the portion of the tee member entering the interior of the casing 1 through the cover 3 and into the path of the lever arm 34. The other end of the valve is formed with a guiding stem 39 entering a guiding socket 40 formed in a plug 41 closlng the The other member of the tee 35 is bored out as indicated at 42 to receive a screen member 43 and from this bored-out portion there is formed a passage 44 expanded into an annular passage surrounding the neck of the plug 41 and through the neck of this plug 41 there-is formed a passage 45 which will be always in communication with the expanded ortion of the passage 44 so that however deeply the plug 41 is screwed into the boredout' portion 0 the first named memberof the tee, this bored-out portion above the .valve 37 will always be in communication with the other member of the tee through the screen 43. The said other member of the tee is connected to a suitable reservoir of volatile liquid such for instanceas gasolene and it is assumed that the reservoiris so located that the gasolene will gravitate to the valve 37 under all conditions of running. The device is provided with a priming pin 46.

Within the pipe 4 there is pivoted a damper 47, the arbor 48 of which extends through the wall of said pipe and terminates in a crank arm49 which may be connected to operating means within reach of theoperator as is customary in devices of this character.

The reservoir 1 1s provlded w1 h a drain cotk 50 so that any gasolene which may be within the reservoir may be removed therefrom 'for cleaning or other purposes.

When the supply of gasolene is turned on the gasolene will flow through the tee 35, the float 26 being in the lower position and consequently moving the lever 31 so as to hold' the valve37 in the upper or open position.-

Ultimately enough gasolene flows into the reservoir 1 to raise the float until it turns the leverp3l on its pivot to a suflicient extent to depress the end 34 of the lever and thus allow the valve 37 to close and cut oil the supply of gasolene Under these conditions the level of the gasolene within the float chamber is below the open end of the jet 24. The needle valve 19 being sufliciently open the gasolene.- Wlll flow; 1n to the jet to the level of the gasolene w1th1n the reservoir 1. 'It will be noted that the area of the float very nearly approaches that of the gasolene within the reservoir 1- and so in order to prime the carbureter it is only necessary to depress the priming pin 46 which is so located as to engage one of the nozzle. As soon as the priming operation is completed the pin 46 is released and returned to its original position under the action of a suitable spring and the float returns to its position of equilibrium on the surface of the gasolene within the reservoir 1 As the engine continues to run thesuction produced will cause the drawing of gasolene from the jet 24 and the indrawing of air through thenozzle 8 and also through the passages 11 "exterior to said nozzle but still into the chamber 2. -The incoming air through the contracted opening 10 ofthe nozzle 8 tends to mix with the gasolene en tering through the jet 24- and the mixture IS I further completed by the air coming through the passages 11 into the chamber 2.

As the supply of gasolene within Jthereservoir 1 is drawn upon the level sinks andthe float 26 follows thus turning the lever 31 on its pivot in a direction toelevate the end 34' and so engage and open'the valve. 37 whereupon more gasolene will flow into the reservoir or container 1 and the former level will be restored thus elevating th'e-float and cansmg the closlng of the valve 37. Thisaction .115

is quite sensitive and therefoi'e the level of gasolene wlthin the reservoir or container 1 is maintained sensibly constant.

The axis of connection of the lever 31 with the float is usually transverse to the length of the vehicle upon which the carbureter 1s mountedv so that when the vehicle 1s upon an incline the lack of close fit of the float in the interior of the reservoir 1 will permit this float to turn a limited distance upon the axis mentioned without elevating, or depressing the lever and consequently the change in level on one side or the other of the reservoir 1 because vehicle will have no appreciable eflect upon the float so far as the operationof the lever of the tilting of the 31' is concerned. The level of gasolene is therefore maintained sensibly constant even when the vehicle is upon an inclineof confrom the operators seat. The operator has also under control the amount of gasolene flowing through the jet by a suitable manipulation of the valve.19 which latter may be set by the operator in accordance with conditions. Furthermore, the operator has control over the amount of air flowing into the chamber 2 exterior to the nozzle 8 by the collar 15 thus throttling to a greater or less extent the openings 11. Furthermore, the operator has under control the relation of the upper end 10 of the nozzle 8 to the open end of the jet 24 by screwing the nozzle to a greater or less extent into the chamber 2, the jet 24 being in substantially fixed relation to the normal level of the gasolene within the reservoir 1 as determined by the float 26.

What is claimed is A carbureter comprising a fuel chamber having an air passageway therethrough, a

fuel jet connected with the chamber and arranged to discharge in the said air passage way, an air nozzle surrounding the fueljet;

a collar provided with air passages and supporting the nozzle in the before mentioned air passageway said collar and air nozzle being longitudinally adjustable in the air passage and with respect to the fuel jet and a valve flange slidably mounted upon the nozzle and normally closing the air passages.

in the collar.

In testimony that I claim the foregoing as my own, I have hereto aifixedmy signature in the presence of two witnesses. v

1 CHARLES EDWARD MAUD.

' Witnesses:

P. H. GONCAERES, E. E. JAMES.

} Copies of this patent may be obtained for five cents each, by addressing the (lommissioner of Patents, 

